<!doctype html>
<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
#area select { background: transparent; padding: 5px; font-size: 14px; border: 1px solid #ccc; height: 34px;
</style>
	</head>
	<body>
    <div id="area"></div>
</body>
<script src="linkage.js" type="text/javascript">
	
</script>
	<script type="text/javascript">
		var ele = document.getElementById('area')
		linkage(ele);
	</script>
</html>